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8
Maintenance
Replacing the fan
1. Disconnect the electrical connection of the motor.
2. Remove the protective grille with the fan from the
unit housing.
3. Remove the fan from the protective grille.
4. Mount the new fan on the protective grille.
5. Reattach the protective grill with the fan to the unit
housing.
6. Reconnect the motor.
Replacing the heat-exchanger
1. Disconnect the electrical connection of the motor.
2. Drain the heat-exchanger and disconnect the heat-
ing medium connections.
3. Remove the accessories on the air intake and outlet
sides and take the unit out of the bracket (mount).
4. Remove the rear wall with the fan.
5. Loosen the attachment screws of the heat-
exchanger and take out the heat-exchanger on the
air intake side.
6. Insert the new heat-exchanger and reassemble the
unit in the reverse order.
7. Reconnect the motor.
Inspection following maintenance:
◊ The fan wheel must be able to rotate freely in the fan
housing.
◊ The distance between the fan blades and the fan
housing must be the same.
◊ The motor must rotate in the direction of the arrow.
◊ After service and maintenance is complete, an elec-
trical safety test must be conducted in accordance
with VDE 0701.
Service and Care
REMKO PWW units require virtually no maintenance
when operated normally. They should, however, be
checked regularly and, if necessary, cleaned, to ensure
proper operation.
General care
◊ Keep the inside and outside of the unit free of dust
and other deposits.
◊ Keep the air intake and outlet openings from being
blocked.
◊ Check the protection grilles and the heat-exchanger
at regular intervals for dirt.
◊ Inspect any mounted filters.
Clean or exchange if necessary.
Important precautions prior to maintenance work
Perform the following steps prior to all service work:
1. Separate all poles of the unit from the power supply
and secure it from being switched on by unauthor-
ised persons.
It is not adequate to switch the unit off via the control
switch on the switching unit!
2. Wait until the fan stops.
3. Turn off the flow of water and secure it from being
opened on by unauthorised persons.
4. Wait until the heat-exchanger has cooled down.
Do not flood the motor and the housing. Do not
damage or bend the fan blades or plate fins.
Cleaning materials
◊ Only clean the unit when dry or with a slightly moist
towel and a soap solution.
◊ Never use high-pressure or steam cleaners.
◊ Do not use abrasive cleaners or cleaners that con-
tain solvent.
◊ Even when the unit is extremely dirty, only use suit-
able cleaning materials.
Cleaning the unit
1. Clean the air intake openings and the air outlet plate
fins.
2. Clean the fan blades.
If necessary, dismantle the motor or protective grille
beforehand.
3. Clean the fins of the heat-exchanger either by blow-
ing air out or in, or with a soft brush.
4. Remove extreme dirt on the fan and plate fins with a
soap solution.
5. Mount the motor or the protective grille with the fan.
Make sure that the distance between the fan blades
and the housing is the same all the way around.
6. Clean or replace the pocket filter (accessory) if there
is one.
7. To do this, loosen the screws of the filter housing
and take the filter out.